Device for protecting an optical or infrared window against laser radiation

US4431257A · kind A · utility

Assignee

• Messerschmitt-Boelkow-Blohm Gesellschaft mit beschraenkter Haftung · DE

Inventor

• Gunthard Born · Munich, DE

Key dates

• Filing date: Aug 31, 1981
• Grant date: Feb 14, 1984
• Expiry date: Aug 31, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B5/24
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A window which is transparent to radiation in the visible, optical and near nfrared range but not transparent to the radiation of a laser, is protected against distruction or damage by the laser radiation. For this purpose the window itself is constructed of at least two layers of solid optical material which is also transparent to the high energy laser radiation. These layers form a cooling channel through which a gaseous or liquid coolant flows. The coolant is transparent to the visible and near infrared range, but opaque to the laser radiation.